Check wich versions of Node are compatible with Duniter
Here: https://forum.duniter.org/t/nouveau-tutoriel-de-developpement/3570/11, we have a user that can't use Duniter with NodeJS 9.
I think Duniter should be compliant with Node 6, 7 and 8, but let's check this.
Also once it's done, change the package.json to tell this. I finally notice that current engine
constraint in package.json is too hard:
"engines": {
"node": ">=6.11.1",
"npm": ">=3.10"
}
We should just say ">=6" for example.